linux-kernel - [PATCH 3.12 40/76] batman-adv: Fix broadcast/ogm queue limit on a removed interface

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Message-Id: <58d2b7773c3b117f3feca0bca1402ca1bc275f04.1463648873.git.jslaby@suse.cz>
Date:	Thu, 19 May 2016 11:08:02 +0200
From:	Jiri Slaby <jslaby@...e.cz>
To:	stable@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Linus Lüssing <linus.luessing@...3.blue>,
	Sven Eckelmann <sven@...fation.org>,
	Marek Lindner <mareklindner@...mailbox.ch>,
	Antonio Quartulli <a@...table.cc>, Jiri Slaby <jslaby@...e.cz>
Subject: [PATCH 3.12 40/76] batman-adv: Fix broadcast/ogm queue limit on a removed interface

From: Linus Lüssing <linus.luessing@...3.blue>

3.12-stable review patch.  If anyone has any objections, please let me know.

===============

commit c4fdb6cff2aa0ae740c5f19b6f745cbbe786d42f upstream.

When removing a single interface while a broadcast or ogm packet is
still pending then we will free the forward packet without releasing the
queue slots again.

This patch is supposed to fix this issue.

Fixes: 6d5808d4ae1b ("batman-adv: Add missing hardif_free_ref in forw_packet_free")
Signed-off-by: Linus Lüssing <linus.luessing@...3.blue>
[sven@...fation.org: fix conflicts with current version]
Signed-off-by: Sven Eckelmann <sven@...fation.org>
Signed-off-by: Marek Lindner <mareklindner@...mailbox.ch>
Signed-off-by: Antonio Quartulli <a@...table.cc>
Signed-off-by: Jiri Slaby <jslaby@...e.cz>
---
 net/batman-adv/send.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/net/batman-adv/send.c b/net/batman-adv/send.c
index 0266edd0fa7f..3e002d3d8765 100644
--- a/net/batman-adv/send.c
+++ b/net/batman-adv/send.c
@@ -364,6 +364,9 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
 
 		if (pending) {
 			hlist_del(&forw_packet->list);
+			if (!forw_packet->own)
+				atomic_inc(&bat_priv->batman_queue_left);
+
 			batadv_forw_packet_free(forw_packet);
 		}
 	}
@@ -390,6 +393,9 @@ batadv_purge_outstanding_packets(struct batadv_priv *bat_priv,
 
 		if (pending) {
 			hlist_del(&forw_packet->list);
+			if (!forw_packet->own)
+				atomic_inc(&bat_priv->bcast_queue_left);
+
 			batadv_forw_packet_free(forw_packet);
 		}
 	}
-- 
2.8.2